The hex color #b0281c is a dark color. The web-safe version is Hex
#993333. A complementary color is
#4FD7E3. The grayscale version is
#515151. A 20% lighter version of the original color is
#E35B4F, and Hex
#7D0000 is the 20% darker color. If the color is saturated by 10%, you get
#B92417. If the color is desaturated by 10%, the color
#A72C21 is obtained.